A Florida woman who was reported missing last week is dead and her daughter's boyfriend will be charged with her murder, police said Sunday. 

Investigators said that 26-year-old Roy Nichols Jr. confessed to killing Tricia Freeman, 47, during an argument at Freeman's home in Palmetto Tuesday.

Palmetto Police Chief Scott Tyler told reporters that Nichols Jr. recounted how Freeman said something that "set him off." Tyler did not elaborate on how Freeman died. 

Nichols Jr. and his girlfriend, Freeman's 21-year-old daughter Kayla Colyer, drove north after Freeman's death in her car. The vehicle was found Friday at a park in Ashland, Ky., where it had been abandoned. 

Nichols Jr. and Colyer were apprehended Saturday at a truck stop in Cabell County, W.Va., when a clerk working at the store recognized them from a news broadcast and alerted authorities.

Nichols Jr. will face charges of second-degree murder in Freeman's death, while Colyer will be charged with accessory to murder after the fact.

Tyler said the pair told authorities where they dumped Freeman's body, but did not elaborate except to say it was somewhere in Florida. 

The Associated Press contributed to this report.

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